Blast-furnace construction.



J. '0. BARRETT. BLAST FURNACE GONSTRUGTION F... .IIIL

F -EL 1-1-5-;

APPLICATION I'ILED MAY 19, 1909.

WITNESSES J. G. BARRETT BLAST FURNACE CONSTRUCTION.

APPLICATION FILED MAY 19, 1909.

Patented Dec. 14, 1909.

2 SHEETSSHEET 2.

(I'IIIIIIIII/III'IIIIIIII III/11111111111111!!! INVENTOR WITNESSES cooling of the refractory JACOB C. BARRETT, OF YOUNGSTOWN OHIO.

BLAST-FURNACE CONSTRUCTION.

Specification of Letters Patent,

Patented Dec. 14, 1909.

Application filed my 19, 1909. Serial No. 496,942.

To all whom it may concern:

Be it known that I, JACOB C. BARRETT, of Youngstown, Mahoning county, Ohio, have invented a new and useful Blast-Furnace Construction, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a. vertical sectional elevation of a portion of a blast furnace constructed and arranged in accordance with my invention; Fig. 2 is a horizontal section on the line IIII of Fig. 1; Fig. 3 is a side elevation showing an improved form of cooling plate forming part of my invention; Fig. 4 is a longitudinal section on the line IVIV of Fig. 3; Fig. 5 is a top plan view of the cooling plate shown in Figs. 3 and 4t; and Fig. 6 is a sectional side elevation showing a modified form of cooling plate constructed in accordance with my invention.

My invention relates to the construction of blast furnaces and the use of water-cooled plates for protectingthe refractory lining of such blastfurnaces.

V The invention more particularly relates to lining in the shaft of suchl furnaces above the furnace mantel plate, and to the construction of the cooling plates used in connection therewith.

The object of my invention is to provide improved means for cooling the shaft of such furnaces, by which the plates are securely held in place in the refractory lining, and by the use of which a much greater coo ing surface is presented to the lining with a very great reduction in the number of plates necessary to obtain the desired cooling effect.

Heretofore it has been attempted to cool part of the refractory shaft lining of blast furnaces by placing one or two rows of fiat cooling plates above the mantel. plate of the construction ordinarily used in the bosh of the furnace. The use of such plates requires that they be placed in rows located vertically above one another in planes a considerable distance from each other. The cooling surface presented by such plates toward the interior of the furnace is comparatively small, and as a result, the lining rapidly becomes burned or worn in irregular lines extending between the rows of such plates. By means of my improved cooling plate, and improved manner of securing these plates in the'shaft at points a short distance lining, a much greater cooling efiect is obtained and these diificulties are overcome and prevented.

In the drawings, 2 represents the well, 3 the bosh, and 4; the lower part of the shaft of a blast furnace. The refractory shaft lining 5 is surrounded by the usual metallic furnace shell. 6. The shaft.- lining and the shell are supported on the mantel plate 7, which is carried by column supports 8' in the usual manner. Placed in the refractory lining 5 of the furnace shaft and spaced at suitable intervals, is a series of rows of hollow metal water-cooled plates 9, these plates also forming part of my invention.

As shown in Figs. 3, 4, and 5, a hollow coil is formed by the bent pipe 10,. which is castin place in the surrounding metal plate. The ends of the pipe terminate in the horizontal leg 9 of the cooling plate, and are connected to suitable water supply or inlet and outlet pipes.

It will be seen by reference to Figs. 3, 4, and 5 that the cooling plate is of peculiar construction, and has a horizontally extending leg 9 formed integral with the vertically extending leg 9'. Instead of casting a pile coil in a cast metal body, as is shown in Figs. 3, 4 and '5, theplates may be cast hollow as is shown in Fig. 6. In placing these plates in the furnace when the refractory shaft lining is being constructed, the plates are secured at the proper elevation, and are then surrounded by the refractory lining 5. The vertical legs 9 present a vertical cooling surface of large area toward the interior of the furnace, and the horizontal leg 9 serves to securely hold the plate in place in the refractory lining.

In assembling the plates in place in the lining, a suitable number are spaced at. regular intervals, so as to encircle the interior of the furnace and the refractory lining is then continued until it reaches such a height that another row of plates is to be put in place. It will be seen that should the refractory material in the shaft lining, extending beyond the inner surface of the vertical legs 9 of the cooling plates, become burned or worn away by the passage of stock through the furnace, even to an extent to expose the vertical surfaces of the plates, the horizontal legs will still securely hold the plates in place. The plates in being placed in position, .arearranged so that the plates in one row are staggered with relapossible with tion to those in the adjacent row or rows. lining, a cooling plate embedded therein The assembling of the plates as described is i having a vertically extending leg formed inthen carried out with succeeding rows of plates, and the plates may be placed in the lining at suitable intervals to the extreme top of the furnace shaft when desired.

The advantages of my invention will be apparent to those skilled in the art; Instead of having a thin, narrow edge of the water-cooled plate presented for cooling action toward the interior of the furnace, a large surface is presented by each plate and the plates are disposed in such manner in the furnace as to give a much greater cooling effect than has heretofore been found plates of the same weight. The angular or horizontal leg of the cooling plates affords a secure means for supporting and retaining the plates in place in the furnace lining.

. The number of plates required to effectively water-cool the shaft of a furnace is very largely reduced, and by reason of the novel securing means employed for. the plates, the plates can be placed in rows which are very much closer to each other than has been used heretofore.

Modifications in the construction and arrangement of the parts may be made with- .out departing from my invention. The relatlve lengthof the horizontal and vertical legs may be changed as is desired. The size of the plates and the length compared to the width may be varied, and other changes may be made.

I claim:

1. In a blast furnace, a refractory lining, and a cooling plate embedded in said lining, the cooling plate having cooling surfaces extending at an angle to each other, the opposite walls of the cooling surfaces being in contact with the lining, and connections for circulating a-fluid within passages in said plate; substantially as described.

2. In a blast furnace having a refractory lining, a cooling plate having a vertically extending leg formed integral with a horizontally disposed leg, the opposite walls of the vertical and horizontal legs being in contact with the lining, hollow passages in said plate and means for circulating a c00ling fluid in said passages; substantially as described.

3. In a blast furnace having a refractory possible in the constructions tegral with a horizontally disposed leg, the

legs being in contact with the lining, hollow passages in the vertical leg of said plate and means for circulating a cooling fluid in said' passages; substantially as described.

4. In a blast furnace, a refractory shaft lining and cooling plates embedded in said lining having integral horizontally and vertically extending water cooled surfaces, the opposite walls of the horizontal and vertical surfaces being in contact with the lining, said plate having hollow passages therein and connections for circulating water through said passages; substantially as described.

5; In a blast furnace, lining and a plurality of encircling cooling plates embedded in said limng having integral horizontally and vertically extending water cooled surfaces, theopposite walls of the horizontal and vertical surfaces .being in contact with the lining, said plates having hollow passages therein and connections for circulating water through said passages; substantially as describe 6. In a blast furnace, a refractory shaft lining and a plurality of encircling cooling plates embedded in said lining having integral horizontally water cooled surfaces, the opposite walls of the horizontal and vertical surfaces being in contact with the lining, said plates having hollow passages therein and connections for circulating water through .said passages; substantially as described.

7. In a blast furnace, a refractory shaft lining and a plurality of encircling cooling plates in said lining having integral horizontally and vertically extending water cooled surfaces, said plates having hollow passages therein and connections for cira refractory shaft culating water through said passages, the

plates in one row being staggered relative to those in an adjoining row; substantially as described.

In testimony whereof, I have hereunto set my hand.

JACOB o. BARRETT.

and vertically extending 

